I don't know about the current generation, but in my experience they're reliable, durable, balanced and firm -- important for a travel notebook; nothing beats a Thinkpad keyboard imo. I find their complimentary software to be well designed and unobtrusive. They're well documented. The online community on forums tend to be mature, knowledgeable and helpful.

My Thinkpads have served me dutifully in all kinds of locations and conditions.